One of my boyfriend's pals' birthday was coming up, and this friend of his had broken up with their girlfriend about a month earlier. My boyfriend wanted to do something for him for his birthday.. and he came to me and asked me for a favor, and for my opinion on his idea. In short, he wanted to ask me if I was willing to be his friend's birthday present. He figured his friend had a lot of sexual tension since he had recently broken up with his girlfriend and wanted to give him a little "pick-me-up"... in the form of him being able to use me freely on his birthday.

I had to think about it a bit... my boyfriend and I have been together for a few years and I never thought about being in a like, open relationship or something like that. But this was my boyfriend asking me specifically to have sex with his friend, will full knowledge of it, and it was his suggestion. I took a bit of time to think about, and I talked to my boyfriend about it as well since I wanted to make sure that he was actually okay with it, and that it wouldn't end up creating a rift in our relationship. My boyfriend said he was fine with it, but that if I still had my doubts, then he didn't want me to have second thoughts and eventually grow to regret the decision. I thought about it a bit and figured one day wouldn't really hurt... and so I agreed.

So on the day of his friend's birthday, my boyfriend had an idea - he had me wearing only a silk robe with nothing under it, and he drove us over to his friend's place. His idea was to knock on the door, tell his friend what was going on, and pull the robe off of me and shove me into his friend's apartment - leaving me totally naked for his friend to do whatever he wanted with me. And that's basically how it went - He greeted his friend for his birthday, and said he had the perfect gift for his friend. He undid my robe and took it off of me, leaving me totally exposed in the hallway and his friend looked absolutely stunned, and I was a bit embarrassed and nervous. My boyfriend slapped my ass and I stepped into the apartment, and he told us to have fun as he walked away with my robe, leaving me totally naked in his friend's place.

His friend still looked totally confused and wasn't sure what was going on. I clarified as best as I could, fighting my impulse to cover myself with my hands while he stared at my body. He asked if I was okay with it, and I said that I talked with my boyfriend about it and I was willing to be his free-use toy for the whole day.

He said something like "free use... huh". And I told him he could do whatever he wanted with me. And that seemed to light some kind of fire inside of him because in an instant he stepped up and pulled me up against him, his hands on my ass as he shoved his lips onto mine and we started to make out. I was getting really nervous - my heart was beating and I was making out totally naked with someone who wasn't my boyfriend... but I tried my best to just let it happen. I tried to not think about it in that way, and tried to imagine that this was my boyfriend so that I could get immersed and give my boyfriends' friend the best time I could. And he seemed like he was having a great time. He gently pressed me up against a wall as we kept kissing, and soon enough lifted me up still against the wall to get me high enough where he could suck on my tits without needing to lean down. I held his head gently, and was struggling to keep myself quiet as he sucked on my nipples, switching between them frequently.

After a bit of that, he brought me up even more, until I had my legs resting on his shoulders as he had his head in between my thighs, and he was licking around my pussy and slowly eating me out. I was doing my best to keep my balance and not be too loud but he was making it very difficult, but I didn't have to worry about that for too long since he did bring me back down, and we made out a little bit more before he push me away for a second, and took his shirt off. Within maybe 10 seconds he took all of his clothes off and now we were both totally naked, and still with my back against teh wall, he put his hands on my shoulders and pushed down, signaling crouch down as he took his cock and put it in my mouth. At first he let me suck him off at my own pace but it didn't take long for him to put his hands on my head and to start slowly thrusting into my mouth, picking up speed until he was straight up face-fucking me up against his wall. He kept on going with that until I felt him cum in my mouth, practically down my throat and he kept thrusting until he had blown his entire load.

He gave me a little bit of a breather. I swallowed his load and he was telling me that he might have overdone it, that his ex-girlfriend never let him cum in her mouth and that he just couldn't help but blow his load in mine. I told him it was okay, and reminded him that it was up to him what he did with me since I was his free-use toy for the whole day... and while he did say that was true, he did tell me that if he stepped too far to absolutely tell him. That was reassuring but I wanted to try and give him as much as he wanted.

He put his clothes back on and while he "recharged" he had me sit on his lap and we simply made out for a little while. He was fondling my body with his hands and occasionally going down to suck on my nipples, but we kissed for quite a bit. He did at one point stop the kissing, since he thought of something else that he wanted me to do. He went to his room and came back with these cuffs and said that his ex-girlfriend never tried bondage with him, so he had me put my hands behind my back and cuffed my wrists together, which amplified the feeling of free use because now I couldn't even us my arms.

And for most of the rest of the day I had those cuffs, except for when we took breaks to eat or to go to the bathroom... but I was cuffed when making out, when sucking him off... or when we were having sex. Basically if he wasn't drained, I was sucking him off or we were fucking, and if his balls were drained... we were making out or he was fondling me. He had total control over using me with the cuffs he had on me, to the point where at one point he even brought me out of his apartment in the hallway, and pinned me up against the wall totally naked and cuffed as we made out. I kept telling him we should probably stop before either someone walks down the hall or one of his neighbors hears us, and for a little bit he pushed the limit of it and kept going, but eventually brought us back into his apartment to continue the make-out with no risk of us being seen.

But that's how the day played out - just constantly played with by my boyfriend's friend for his birthday. He said he really needed something like this and appreciated my willingness to basically totally surrender to him - I never told him he was truly going too far and he said he had more fun with me in one day than he ever did with his ex-girlfriend.